Adobe Community: 3D Shadow

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1. Mylenium,

Apr 18, 2012 5:16 AM in reply to RB2005

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Could you re-post your question and provide a proper explanation of what you are doing? No offense, but this is exactly the kind of "mumbling at the screen" question that usually nobody can answer because we are not seeing what you are seeing.

Mylenium

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2. RB2005,

Apr 18, 2012 5:40 AM in reply to Mylenium

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Ok. No problem.

I created a 3D dice in AE using six textures. After I did a PRE-COMP of these layers, rotated the object, insert a light and put a background image to project the shadow of the dice. In the dice composition I enabled CASTSHADOW and did the same with the light, but the shadow does not appear. My question is if this is possible or not.

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3. Mylenium,

Apr 18, 2012 7:06 AM in reply to RB2005

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Shadows will only appear on 3D layers. There is no such thing as a shadow matte/ shadow catcher in AE. If you need shadows either make your BG layer a 3D layer as well or create a duplicate of your dice comp all in white/ greys with shadows, then apply it as a 2D comp on top using multiply blending mode.

Mylenium

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4. RB2005,

Apr 18, 2012 7:54 AM in reply to Mylenium

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When I create a pre-comp layers that I positioned in the three-dimensional space and then the collapse in asset pre-comp and convert to 3D layer in anothercomposition and include lights + background, I can make this pre-comp shows shade in the background or I can do this only with layers and not with pre-composed?

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5. Andrew Yoole,

Apr 18, 2012 5:50 PM in reply to RB2005

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Attached is a CS5 project file with a precomped 3D cube casting a shadow on a solid floor.

Attachments:

Shadow demo.aep.zip (5.4 K)

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6. Rick Gerard,

Apr 19, 2012 12:06 AM in reply to Andrew Yoole

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Create a 100 x 100 pixel solid, and a comp size solid. Make them both 3-D layers. Rotate the comp size solid 90° on the X axis. Position the comp size solid at the bottom of the small square solid. And a light and a camera. Position the light so it shines down and at an angle to the small square solid. If no shadow appears, select both solids and the light then press the a key twice. Use should see material properties and properties for the light.

Select cast shadows on the light, cast shadows on the small solid, and accepts shadows on the large solid.

There you go. The basics of how to cast a shadow.

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7. RB2005,

Apr 19, 2012 4:15 AM in reply to Andrew Yoole

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Thank you, Andrew.

Through his project I found the error in mine: I had not enabled "Shadow Cast" for each texture, only to the PRE-COMP. Thank you very much

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After Effects

3D Shadow

Apr 18, 2012 4:39 AM

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